MathWorks Engineer interview questions

I have talked HR in career fair at the end of September. They asked me to submit my application online. I got phone interview about general questions, such as describe the job position, how did u deal with multitasks, etc. HR scheduled next technical phone interview after she asked all the general questions. The technical questions are so detailed, including math, c/c++,matlab, and signal process. I canot answer some questions, because I forgot them. You really need to prepare in detail. HR said would give me response within two weeks. I didnot hear anything from them, which means I was rejected.